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what kinda urchin is this (pic)?
http://img146.imageshack.us/img146/5515/cimg1462.j...
About 3/4 inch wide now. came with a rock. The lower spines are kind long and blunt and get shorter to the top.
Got a slightly better pic. kinda tough since the urchin is solid black and rather small. http://img132.imageshack.us/img132/7311/cimg1497h....
No idea where the rock came from aside from out of the LFS, uncured. The urchin hides somewhere in the rock at night and moves all over it's rock during the day. Very territorial as it don't normally leave rock or a 5"x5" square area.
As it's been growing, It starts to appear that it's spikes go in rows vertically like a tuxedo's. A lot of times when it is out grazing on the rock during the day, it will excrete white stuff that looks like large grains of crushed coral sand from the center top. Only other thing I can describe on it is that the spines are not point nor flat but strait with smooth rounded ends.
1 Answer
- TheRav1nLv 71 decade agoFavorite Answer
I think it is a Arbacia lixula.
http://www.enciclopedia.com.pt/images/arannna_jk.j...
http://www.echinoids.nl/Echinoids/Arbacia-lixula/A...
But it also looks a bit like Centrostephanus rodgersii.
http://www.boldsystems.org/pics/EAR/DSC_0006+11818...
Or of course, Echinometra lucunter....
http://www.thatpetplace.com/images/presentation/21...
And a few others...
Do you have a better picture, he is a little fuzzy in this one. Also, where did the rock come from (fiji? tonga? etc)? Is he living in a hole in the rock?
Source(s): Fish Store Owner
